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Measurement injection-based generator model parameter checking method

A generator model and parameter checking technology, which is applied to the control of generators, electrical components, control systems, etc., can solve problems such as inaccurate parameters, time-consuming and costly testing, and affecting the normal power supply of generator sets, so as to achieve judgment Effect

Active Publication Date: 2013-01-16
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the generator set test is time-consuming and expensive, and it will also affect the normal power supply of the generator set, and the parameters measured on site will also be inaccurate due to various error reasons

Method used

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  • Measurement injection-based generator model parameter checking method
  • Measurement injection-based generator model parameter checking method
  • Measurement injection-based generator model parameter checking method

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Embodiment Construction

[0021] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] The method of the present invention constructs a controlled voltage source by using the actual measured machine terminal voltage and phase data injection, realizes the decoupling of the generator to be evaluated and the external system, and performs simultaneous simulation with the generator model to calculate the simulation output curve and the measured reference The similarity of the curves realizes the judgment of the usability of the parameters of the generator model. figure 1 It is a flow chart of the generator model parameter calibration method based on measurement injection.

[0023] The specific design steps of each link of the inventive method are as follows:

[0024] Step 1: Use the wide-area measurement system to perform online detection of the generator terminal voltage drop event on the real-time ...

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Abstract

The invention discloses a measurement injection-based generator model parameter checking method. The method comprises the following steps of: performing generator terminal voltage sag event online detection on generator terminal real-time phasor data by using a wide area measurement system; performing steady-state fitting on a fault voltage before and after the fault by reading fault data corresponding to a generator terminal voltage sag event; realizing the dynamic simulation initialization of a generator to be analyzed by utilizing steady state data before the fault; structuring a controlled voltage source in a measurement injection mode; performing dynamic simulation in a simultaneous mode of the controlled voltage source and a generator model; calculating the numerical similarity and the trend similarity of a simulation result and an actually measurement result; and judging whether generator model parameters adopted in the simulation calculation can be used for the simulation calculation of an electromechanical dynamic process of an electric power system according to similarity calculation results. By using the method, the judgment on the availability of the generator model parameters is realized so that guidance and basis are provided for the test work of the generator model parameters.

Description

technical field [0001] The invention belongs to the technical field of power system stability analysis and simulation, and in particular relates to a generator model parameter checking method based on measurement injection. Background technique [0002] At present, in the power system, people rely more and more on simulation to complete a large number of planning and operation work. Dynamic simulation tools are widely used in power system stability analysis and control, and are also used by power grid dispatching departments as the main basis for guiding power system operation. In dynamic simulation, it is obvious that accurate models and parameters are very important to the reliability of simulation. On August 10, 1996, the power grid in the western United States experienced a major power outage. The system oscillated and disconnected, causing a large-scale blackout. It can be seen that when the existing models and parameters cannot accurately reflect the actual operating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02P9/00
Inventor 陈刚时伯年吴小辰吴京涛柳勇军杨东
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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